Instruction manual

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MR98 Series

D103588X012

Instruction Manual

January 2015

www.fisherregulators.com

MR98 Series Backpressure Regulators, Relief

and Differential Relief Valves

Figure 1. Typical MR98 Series Backpressure Regulators, Relief and Differential Relief Valves

TYPE MR98L

TYPE MR98H

TYPE MR98L

P1757

P1753

Summary of content (36 pages)

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MR98 Series Instruction Manual January 2015 MR98 Series Backpressure Regulators, Relief and Differential Relief valves P1757 TyPe MR98L P1753 TyPe MR98H D103588X012 Figure 1. Typical MR98 Series Backpressure Regulators, Relief and Differential Relief Valves www.fisherregulators.
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MR98 Series Specifications This section lists the specifications for the MR98 Series regulators. Factory specification such as type, maximum inlet pressure, maximum temperature, maximum outlet pressure, spring range, orifice size and seat material are stamped on the nameplate fastened on the regulator at the factory. Available Constructions Type MR98L: Direct-operated low pressure backpressure regulator/relief valve with 2 to 38 psig / 0.14 to 2.
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MR98 Series ! Warning Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion, fire and/or chemical contamination causing property damage and personal injury or death. Fisher® backpressure regulators, relief and differential relief valves must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations and Emerson Process Management Regulator Technologies, Inc. (Emerson™) instructions.
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MR98 Series adjusting screw control spring vent diaphragm valve plug orifice CONTROL LINE TAP TYPE MR98H WITH INTERNAL PRESSURE REGISTRATION BACK VIEW OF 1/2 IN. / DN 15 TYPE MR98H WITH EXTERNAL PRESSURE REGISTRATION INLET PRESSURE SIDE AND INTERNAL VIEW OF 3/4 TO 2 IN. / DN 20 TO 50 TYPE MR98H WITH EXTERNAL PRESSURE REGISTRATION (ALSO TYPICAL OF TYPE MR98L, 1/2 TO 2 IN.
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MR98 Series handwheel control spring loading pressure inlet tap diaphragm valve plug orifice CONTROL LINE TAP INLET PRESSURE OUTLET PRESSURE LOADING PRESSURE TYPE MR98HD WITH INTERNAL PRESSURE REGISTRATION TYPE MR98HD WITH EXTERNAL PRESSURE REGISTRATION Spring Metal diaphragms gasket for types MR98HD, MR98HHD and MR98LD with two metal diaphragms, assemble diaphragm gaskets under and above the metal diaphragms as shown above Figure 2.
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MR98 Series Table 1. Types MR98L and MR98LD Regulators Body Constructions Without Control Line and Gauge Port NPT NPT SWE Without Control Line and Gauge Port 1/2 in. / DN 15 Welded CL150 RF Welded CL300 RF Welded PN 16/25/40 RF With Control Line but Without Gauge Port NPT NPT SWE Without Control Line and Gauge Port Welded CL150 RF Welded CL300 RF 3/4 in.
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MR98 Series Table 2. Types MR98H, MR98HD, MR98HH and MR98HHD Regulators Body Constructions Aluminum-Bronze Monel® or Hastelloy® C(1) Without Control Line and Gauge Port CF3MStainless Steel(1) 1/4 in. End Connection STYLE CF8M Stainless Steel(1) BODY Construction WCC or LCC Steel Body Size Gray Cast Iron(2) Body Material NPT NPT SWE Welded CL150 RF Without Control Line and Gauge Port Welded CL300 RF Welded PN 16/25/40 RF Integral CL150 RF 1/2 in.
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MR98 Series Table 2. Types MR98H, MR98HD, MR98HH and MR98HHD Regulators Body Constructions (continued) NPT SWE Without Control Line and Gauge Port Welded CL150 RF Welded CL300 RF Welded PN 16/25/40 RF 1-1/2 in.
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MR98 Series Table 3. MR98 Series Body Sizes, Pressure Ranges and Spring Information TYPE BODY SIZE In. 1/4 1/2 DN ---- 15 MR98L and MR98LD 3/4 and 1 3/4 and 1 1/4 1/2 MR98H and MR98HD 3/4 and 1 3/4 and 1 1-1/2 and 2 MR98HH and MR98HHD 1/4 20 and 25 20 and 25 ---- 15 20 and 25 20 and 25 40 and 50 ---- CONTROL PRESSURE RANGE(1) psig bar SPRING WIRE DIAMETER In. mm SPRING FREE LENGTH In. SPRING MATERIAL mm SPRING PART NUMBER SPRING COLOR 2 to 7 0.14 to 0.48 0.148 3.76 2.
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MR98 Series LOADINg PReSSuRe HIgH PReSSuRe ReLIeF OuTLeT AND OPTIONAL PIPINg TO SySTeM uNCONTROLLeD LOW PReSSuRe CONTROLLeD HIgH PReSSuRe PuMP TyPe MR98HD LOW PReSSuRe (FOR LOADINg) CONTROLLeD HIgH PReSSuRe TyPe MR98LD Figure 3.
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MR98 Series Installation ! Warning Personal injury or system damage may result if this backpressure regulator, relief or differential relief valve is installed where service conditions could exceed the limits given on the Specifications section and/or regulator nameplate. Additionally, physical damage to the backpressure regulator or relief valve may result in personal injury or property damage due to escaping of accumulated gas.
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MR98 Series Table 4.
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MR98 Series If remote venting is necessary, an optional tapped vent in the spring case is available. Install remote vent lines in the spring case and outlet openings. The vent lines must have the largest practical diameter and be as short as possible with a minimum number of bends or elbows. Install the vent line according to applicable federal, state and local codes and regulations. Types MR98L, MR98H and MR98HH 1. Loosen the jam nut (key 17, Figures 4, 6, 7 and 10). 2.
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MR98 Series Table 7. Number of Diaphragms Required Body Size Type Spring Range All MR98L and MR98LD 2 to 7 psi / 0.1 to 0.5 bar All except 2 to 7 psi / 0.1 to 0.5 bar 1/4 NPT MR98H, MR98HH, MR98HD and MR98HHD All All All 1/2 to 2 in. / DN 15 to 50 4. Slowly open the downstream vent valve to vent downstream pressure. 5.
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MR98 Series 1. Shut down the relief valve or backpressure regulator. Refer to Shutdown section for the proper procedure. 2. Retighten the cap screws (key 16) in a crisscross pattern. See Table 6 for proper torque values. 3. Follow the Startup section to repressurize the relief valve or backpressure regulator. 4. Refer to the Disassembly to Replace Diaphragm and Seats section as needed. Disassembly to Replace Diaphragm and Seats Caution Metal diaphragms have thin sharp edges.
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MR98 Series 10. Slip the lower spring seat (key 8) and lock washer (key 28) back onto the pusher post (key 10). Lubricate the threads of the pusher post and tighten the pusher post lock nut (key 31) until the lock washer is flat and then turn the nut an additional 1/8 to 1/4 turn. Return the diaphragm (key 12), spring seat and pusher post assembly to the body (key 1). 11. Set the relief valve spring (key 11) in the lower spring seat and place the upper spring seat (key 9) on the spring. 12.
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MR98 Series Parts List Key Description Parts Kit (included are keys 3, 4, 12, 29, 59 and 63) Types MR98H, MR98HH and MR98HD With Stainless steel diaphragm and trim 1/4 NPT Body Size 1/2 in. / DN 15 Body Size 3/4 and 1 in. / DN 20 and 25 Body Sizes 1-1/2 and 2 in. / DN 40 and 50 Body Sizes With Neoprene (CR) diaphragm and Nitrile (NBR)/416 Stainless steel trim 1/4 NPT Body Size 1/2 in. / DN 15 Body Size 3/4 and 1 in.
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MR98 Series Key Description Part Number 7 Valve Plug Guide (continued) 1-1/2 and 2 in. / DN 40 and 50 Body Sizes 416 Stainless steel GF05539X022 316 Stainless steel, NACE, Oxygen Service GF05539X032 GF05539X052 Hastelloy® C, NACE Monel®, NACE GF05539X042 8 Lower Spring Seat, NACE Types MR98L, MR98LD, MR98H and MR98HD 1/4 NPT Body Size Aluminum(1) 1L344609012 Stainless steel 1L3446X0012 1/2 in.
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MR98 Series Key Description Part Number 15 Adjusting Screw, NACE(1) Square Head Adjustment 1/4 NPT Body Size GF05533X012 1/2 in. / DN 15 Body Size Types MR98L and MR98H GF05553X012 Type MR98HH ERAA02340A0 3/4 and 1 in. / DN 20 and 25 Body Sizes Types MR98L and MR98H GF05543X012 Type MR98HH ERCA01483A0 1-1/2 and 2 in. / DN 40 and 50 Body Sizes GF05522X012 Sealed Square Head Adjustment 1/2 in. / DN 15 Body Size GF05553X012 3/4 and 1 in.
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MR98 Series Key Description 21 Diaphragm Head (continued) 1/2 in. / DN 15 Body Size Steel, NACE(1) Stainless steel, NACE 3/4 and 1 in. / DN 20 and 25 Body Sizes Steel, NACE(1) Stainless steel, NACE 1-1/2 and 2 in. / DN 40 and 50 Body Sizes (2 required) 416 Stainless steel 316 Stainless steel, NACE, Oxygen Service Hastelloy® C, NACE Monel®, NACE 22 Adjusting Screw Assembly, NACE Tee Handle Adjustment 1/4 NPT Body Size 3/4 and 1 in.
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MR98 Series Key Description Part Number 32 Stuffing Box (continued) Handwheel adjustment (continued) Type MR98HHD 1/4 NPT Body Size ERAA02699A0 1/2 in. / DN 15 Body Size ERAA02700A0 3/4 and 1 in. / DN 20 and 25 Body Sizes ERAA02696A0 Handwheel adjustment with Stainless steel Trim Types MR98LD and MR98HD 1/4 NPT Body Size ERAA02699A1 1/2 in. / DN 15 Body Size ERAA01655A1 3/4 and 1 in. / DN 20 and 25 Body Sizes ERAA01655A1 1-1/2 and 2 in.
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MR98 Series Key Description 41 Machine Screw (continued) Handwheel adjustment with Stainless steel Trim 1/4 NPT Body Size 1/2 in. / DN 15 Body Size 3/4 and 1 in. / DN 20 and 25 Body Sizes 41 Jam Nut 1-1/2 and 2 in. / DN 40 and 50 Body Sizes Handwheel Handwheel adjustment with Stainless steel Trim 42 Spring Types MR98LD and MR98HD Type MR98HHD 1/4 NPT and 1/2 in. / DN 15 Body Sizes 3/4 and 1 in.
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MR98 Series Key Description 58 Washer (continued) 3/4 and 1 in. / DN 20 and 25 Body Sizes 416 Stainless steel 316 Stainless steel, NACE, Oxygen Service Hastelloy® C, NACE Monel®, NACE 59* O-ring 1/4 NPT Body Size Nitrile (NBR) seat Fluorocarbon (FKM) seat Ethylene Propylene (EPDM) seat 1/2 in. / DN 15 Body Size Nitrile (NBR) seat Fluorocarbon (FKM) seat Ethylene Propylene (EPDM) seat Perfluoroelastomer (FFKM) seat 3/4 and 1 in.
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MR98 Series Key 1, Types MR98L and MR98LD Body Part Numbers Body Material Body Size End Connection Style Gray Cast Iron WCC Steel LCC Steel CF8M Stainless Steel(1) CF3M Stainless Steel(1) 1/4 in. NPT ERCA03713A0 ERCA03713A1 ERCA03713A7 ERCA03713A4 ERCA03713A3 ----------- ----------- NPT ERCA03819A0 ERCA03819A1 ERCA03819A7 ERCA03819A4 ERCA03819A3 ERCA03819A9 ERCA03819B1 1/2 in. / DN 15 Without Control Line 1/2 in. / DN 15 With Control Line 3/4 in.
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MR98 Series Key 1, Types MR98H, MR98HD, MR98HH and MR98HHD Body Part Numbers (continued) Body Material Body Size End Connection STYLE Gray Cast Iron(2) WCC Steel 1/4 in. NPT ERCA03697A0 NPT ERCA03818A0 SWE 1/2 in.
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MR98 Series Key 1, Types MR98H and MR98HD Body Part Numbers (continued) Body Material Body Size End Connection STYLE Gray Cast Iron WCC Steel NPT ERCA01385A0 1-1/2 in.
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MR98 Series Key 2, Spring Case Part Numbers BODY Size SPRING case material Type MR98L MR98LD Style In.
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MR98 Series Key 4*, Valve Plug, Composition Seat Body size In.
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MR98 Series L2 15 L2 17 9 2 L2 L2 11 10 22 50 SEALED ADJUSTING SCREW OPTION TEE-HANDLE OPTION 31 28 21 12 59 L2(2) 16 8 24 25 58 29 T COMPOSITE SEAT OPTION 4 3 L2 7 52 53 L1 63 1 L2 L2 OR(3) L4 5 CONTROL LINE OPTION 13 18 64 18 19 METAL DIAPHRAGM OPTION GF04917 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L4 = Graphite Sealant for graphite ring 1.
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MR98 Series 44 41 38 35 34 L3 39 36 L2 13 43 40 18 42 37 L1 32 33 L2 2 9 L2 10 11 18 31 45 28 64 L1 T 8 24 59 21 16 L2(2) 25 COMPOSITE SEAT OPTION 12 1 58 L2 29 7 L2 63 OR(3) L1 4 L2 4 3 L4 5 52 53 L1 CONTROL LINE OPTION 29 19 12 19 SEE DETAIL A 29 29 SEE DETAIL B DETAIL B APPLY : T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L3 = Silicone Grease L4 = Graphite Sealant for graphite ring 1.
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MR98 Series L2 15 17 50 2 L2 9 22 L2 SEALED ADJUSTING SCREW OPTION L2 10 TEE-HANDLE OPTION 11 28 4 31 L2(2) 16 8 52 53 1 L1 12 29 CONTROL LINE OPTION 58 7 L2 3 L2 5 L2 59 4 L1 OR(3) 63 L4 T 24 25 COMPOSITE SEAT OPTION 18 13 12 19 METAL DIAPHRAGM OPTION 18 64 gf04916 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L4 = Graphite Sealant for graphite ring 1.
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MR98 Series L2 15 17 22 50 2 11 9 L2 10 L2 SEALED ADJUSTING SCREW OPTION TEE - HANDLE OPTION 51 31 8 52 28 53 L1 16 L2(2) L1 45 4 12 21 1 L2 CONTROL LINE OPTION 3 24 T 4 59 25 L2 L1 5 63 COMPOSITE SEAT OPTION OR(3) L4 29 19 12 18 13 METAL DIAPHRAGM OPTION 18 64 ERAA03248 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L4 = Graphite Sealant for graphite ring 1.
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MR98 Series 44 41 38 34 39 35 36 L3 13 18 40 42 43 32 L2 37 L1 9 L2 33 2 11 31 10 18 64 L2 8 28 L2(2) 16 25 59 12 45 24 COMPOSITE SEAT OPTION 58 L2 T 1 7 29 3 L2 5 L2 4 L1 52 OR(3) 63 53 L1 CONTROL LINE OPTION L4 29 19 12 29 SEE DETAIL B 19 SEE DETAIL A DETAIL B DETAIL A METAL DIAPHRAGM OPTION GF04920 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L3 = Silicone Grease L4 = Graphite Sealant for
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MR98 Series 41 44 38 34 35 L3 39 36 40 43 L1 13 42 32 18 37 2 11 33 L2 9 L2 10 L2 31 8 28 L1 16 L2(2) 45 12 21 1 L2 3 4 L1 L2 63 5 OR(3) L4 29 18 24 12 64 T 52 53 19 59 4 19 METAL DIAPHRAGM OPTION 25 COMPOSITE SEAT OPTION CONTROL LINE OPTION ERAA03271 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease FOR O-RINGS L3 = Silicone Grease L2 = Anti - Seize Compound L4 = Graphite Sealant FOR GRAPHITE RING 1.
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MR98 Series L2 17 15 13 9 18 L2 2 L2 51 11 10 28 51 L2(2) 16 31 12 8 1 58 SEE NOTE 4 29 68 7 4 3 L2 5 L2 L1 OR(3) 63 18 64 L4 59 4 T 24 25 53 52 COMPOSITE SEAT OPTION CONTROL LINE OPTION L1 12 19 METAL DIAPHRAGM OPTION ERCA00605 APPLY(1): T = Thread locker L1 = General Purpose PTFE or Lithium Grease for O-rings L2 = Anti - Seize Compound L4 = Graphite Sealant for graphite ring 1. Lubricants and sealants must be selected such that they meet the temperature requirements.
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MR98 Series Industrial Regulators Natural gas Technologies TeSCOM emerson Process Management Regulator Technologies, Inc. emerson Process Management Regulator Technologies, Inc. emerson Process Management Tescom Corporation USA - Headquarters McKinney, Texas 75070 USA Tel: +1 800 558 5853 Outside U.S. +1 972 548 3574 USA - Headquarters McKinney, Texas 75070 USA Tel: +1 800 558 5853 Outside U.S.